Sectional cylinder air-jack.



, Patented July .2, 1912*.

APPLIOATION FILED JUNE 19, 1911.

' resinas...

' funnier conn, or PUEBLO, 'coronario'.

I .Specication cf Letters Patent.

fenomenen `czzrnrivrfnnn AIR-Jaen.

Patented July 2, 1912.

" Application filed .Tune 19, 1911. `Serial No. 634,1%9.

To @ZZ whom it may concern:

Be it known that l, CHAnLns H. Conn, of Pueblo, in the county-of Pueblo and State' of Colorado, have inventedeertam new and useful Improvementsin Sectional Cylinder.

Air-Jackaof which the following is a specication. Y -y This invention relates to fluid actuated lifting jacks, and it-has particular'reference with a piston which isfmountedon -a piston' to that class of fluid actuated lifting jacks in which a plurality" `=l' of cylinders are arranged tandem, `each'cylinder being equipped stem .which is common'to all the cylinders.

The presentv invention 'has for its object to simplify and improve thetypeof lifting` jacks to which reference is made above, a.

particular object being to produce a lifting jack which is mainly built upof units of similar construction, thus economiz'ing in the manufacture and enabling repalrs to be made when necessary at small expense.v e

With these and other ends in' view, which will readily appear as the nature ofthe invention is better understood, the same conf sists in the improved construction and novel arrangement and combination of parte which will be hereinafter fully described and particularly pointed out vin the claims. In the accompanying drawing has been illustrated a simple and preferred form of the inventiomit being, however, understood that no 'limitation is .necessarilymade to the precise' structural details therein exhibited, but that changes, alterations and modifica- -tions within the scope of the claims may be resorted to when desired.

In the drawing the vsingle figure represents a vertical sect-ionalview of a fluid actuated lifting jack constructed in accordance with the invention. u

The improved implement may be made up.

' of any desired number'of cylinder unitsv 1 whichV are ofvsimilar' construction and dixnensions, said cylinder units being exteriorly threaded at both,v ends, and each unit being provided'near its .upper end with a vent aperture 4. The several units 'areconnected together by means of internally threaded bands o16 collars 8.- 'lhe lowermost unit is threaded into a base 6, andfthe t0pmost unit is provided with a cap or head 7 having a centralfaperture for the passage of the piston stem .2.' The meeting ends ofl the cylinder units abut .upon .diaphragms l2 which arecentrally apertured for the paswhich operates therethrough.

v enda relief valve 15.

sage of the piston stem, which latter is turned or lotherwise constructed to present a series of cylindrical sections of gradually reduced diameter,. asshown at a, as", a, a

cap 7 whilethe sections a', a and a,op erate through the diaphragme 12. Adjas the topmost sedtion operating through the cent to the lower end of each section a, a', i

Ill

e, a is formed a shoulder or offset 20 .to form a seat for a piston head 3 which is provided with a packing disk linteriorly'- engaging the cylinder unit and with a plate .or washer 18, whereby said `packing disk is compressed against the piston head,said disk and Washer being retained by means of a nut 13 vfor the receptionbf which the pistchl stem is provided with a threaded portion 14. Eachof the diaphragme 12 is provided with suit-ably arranged packing 5 engaging that' portion of` the piston stem Connected with each of the cylinder units nearvthe lower end thereof is a feed pipe9, the several feed' pipes being connected in series by a stand pipe 21 having at its upper The lowermost ,inlet pipev has an inlet'valve 17, and it is con-A nected by means of a ilexible duct 10 with'a source of supply, not shown, of fluid presvvalve 15 is closed, fluid under pressure may be admitted at the valve 17, said fluid being. distributed; through `the inlet pipe 9 and stand pipe Q1 to the several cylinder units beneath the pistons which are thereby impelled to rise, the vent openings 1 serving to relieve any pressure above the pistons.-

-B rovidirw a luralit of )istons` as here in shown, a -relatively great area is subjected to the fluid pressure which may thus be very eifectively utilized for the purpose of raising heavy weights.I To restore the pistons to their initial position, the supply valve 17 isl closed, and the pressure may now be gradually relieved at the valve 15, permitting the pistons and the stem to settle by gravity.

' land means :for supplying Huid underl pres-M veatedwithjthe' lowerlnostunigfa' head 'on (-Cepiesqf thisPatentvhaygbeobtane yforfiireeiznts each, ,by adressingitlie Coimisso'ner-'of Patents, v v y' Washington,D.C.-

-charaeter described,L a plurality of similar` cylinder units havingi-thre .pistons mounted upon'jthe stein, one piston operating therein.l

thus described the inwention,` what is claimed as new, is

1l' In a fluid actuated liftingja'ek of adedends, dia-` phragms arranged between theA meeting ends" of the Several units, threaded connecting eel-" lars engaging the 'meeting .endsof theLsev'- eral units, a'- base intoV which Vthel lowerinostunit is` threaded; a capthieaded upongthej uppermost un1t, `a v l l through saidv crap and through the several.

piston:` stem operating diaphragme 'separating the Leylind'er units;

being disposed within. each cylinder unit,l

' suretov each cylinderunit- .beneath the-piston 2.111 a *Huid* aotuatedflifting jaekll'a plu'-v rality'xgo'hf. similar eylinder'junits arranged tandem 1n Vertical series,

l lthe lowermost inlet p a 1 base plate 'faSSOr sagesse several diaphragna's, said stem comprising-'a plurality y of fseetions fof; gradually `reduced vdialnet-er, veaehsection having a. shoulder and -a threadeiportion'A at its lower end, pistons iittecl on the sections ofthe. stem within'j the several Cylinders, said pistons 'abutting'-y upon the shouldered portionsof-.saidjsections; nuts on, the lthreadedv port-ions of thepifston stem,

:. between the'severalaunita-afpiston stem'- op e eratingj through the Ahead I25 packingdisksv and' .washerslinterposedjhetween the nuts .and thei,pist on-s,jinlet pipes lower endsl thereof, a standsppe E'eenneetin'g the several'inlet pipes. and havinga relief lvalve. at its upper end, andanfinletvalveonl.

1pe. CHARLESHENRYCOLE. Witnesses l TA# ARTHUR',

J. ERNEsTGoLE.,

.354 I connected -with the ejflinder yunits 4near the 

